Influence of Modification with CuP Master Alloy and Rapid Crystallization on the Tribological Properties of AlSi17Cu5Mg Alloy

Abstract:

The paper presents tests determining the influence of modification with phosphorus and fast cooling on the microstructure and friction coefficient of AlSi17Cu5Mg alloy. Changes mainly concern the size of primary silicon crystals and stereological parameters in reference to initial material. Modification with fast cooling was aimed at achievement of fine-crystalline structure with shapes of silicon crystals close to the spherical shape. The consequences of such activities are visible, significant changes in the tribological properties of tested alloy. Friction coefficient μ for material subject to fast cooling was on the level of 0.26 and for initial material it equalled 0.29.

• Periodical: Solid State Phenomena (Volume 246)
• Pages: 153-156
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.246.153
• Online since: February 2016
• Authors: Jaroslaw Piątkowski*, Robert Wieszała
• Keywords: Aluminium Alloys, Crystallization Process, Friction Coefficient, Modification

References

[1] N. Natahalla, M. Hafiz, M. Abdulkhale, Effect of microstructure on the mechanical properties and fracture of commercial hypoeutectic Al-Si alloy modified with Na, Sb and Sr, J. Mater. Sci. 34 (1999) 3555-3564.

[2] B. Juarez-Peňa, J. Asensio-Lozano, Influence of Sr modification and Ti grain refinement on the morphology of Fe-rich precipitates in eutectic Al-Si die cast alloys, Scripta Mater. 54 (2006) 1543-1548.

DOI: 10.1016/j.scriptamat.2006.01.029

[3] J. Piątkowski, The effect of Al-17wt. %Si alloy melt overheating on solidification process and microstructure evoluation, Solid State Phenom. 176 (2011) 29-34.

DOI: 10.4028/www.scientific.net/ssp.176.29

[4] J. Piątkowski, B. Gajdzik, T. Matuła, Crystallization and structure of cast A390. 0 alloy with melt overheating temperature, Metalurgia 51 (2012) 321-324.

[5] J. Guo, L. Ying, P. Fan, Q. Haixia, T. Quan, The modification of electroless deposited Ni-P alloy for hypereutectic Al-Si alloy, J. Alloy Compd. 495 (2010) 3005-3010.

DOI: 10.1016/j.jallcom.2010.02.012

[6] J. Piątkowski, Influence of overheating degree on material reliability of A390. 0 alloy, Solid State Phenom. 191 (2012) 23-28.

DOI: 10.4028/www.scientific.net/ssp.191.23

[7] J. Piątkowski, Proeutectic crystallization of AlSi17Cu alloy after overheating and modification with Al-CuP master alloy, Solid State Phenom. 211 (2014) 3-8.

DOI: 10.4028/www.scientific.net/ssp.211.3